| South Portland to Cosham | 3,164.46 mi (5,092.70 km) |
| South Portland to Costessey | 3,215.56 mi (5,174.95 km) |
| South Portland to Cottingham | 3,127.54 mi (5,033.28 km) |
| South Portland to Coulsdon | 3,191.50 mi (5,136.22 km) |
| South Portland to Coventry | 3,112.19 mi (5,008.59 km) |
| South Portland to Cowdenbeath | 2,973.80 mi (4,785.88 km) |
| South Portland to Cowes | 3,156.69 mi (5,080.20 km) |
| South Portland to Cowley | 3,172.87 mi (5,106.24 km) |
| South Portland to Cowley | 3,138.51 mi (5,050.95 km) |
| South Portland to Cramlington | 3,057.64 mi (4,920.79 km) |
| South Portland to Cranleigh | 3,181.86 mi (5,120.71 km) |
| South Portland to Crawley | 3,194.39 mi (5,140.88 km) |
| South Portland to Crayford | 3,201.57 mi (5,152.42 km) |
| South Portland to Crewe | 3,061.11 mi (4,926.38 km) |
| South Portland to Crigglestone | 3,086.82 mi (4,967.76 km) |
